when i went to download the Michael Moore movie to my son's iMac, i had to authorize his computer. this is apparently number 5 of my allowed 5. i only have 4 macs right now. where can i find a list of my authorized computers so i can deauthorize what must be an older mac i no longer own?

'I only have 4 macs.' gee, that sounds ridiculous. only 2 people live in my house. we also have a pc. life in the modern age...

This question has been ask several times but NEVER got answered correctly:

How con I see (access) the list of supposedly authorized computers on iTunes?

I just recently purchased a new MacBook Pro, have two iMacs, one PowerBook G4 and one iPhone. That are only four systems. When I now wanted to authorize the new MackBook Pro, the message reads that I have already five computers authorized. I need to know about the five authorized Computers, since I either have by accident authorized one device twice (if that is possible) or someone else has gathered my info and misuses my ID. before I deauthorize all supposedly five devices (and use up the only once per year option to do that) I need to know the devices authorized. Just to deauthorize all does not good.

Now the question again, where or how find i access to a list of for me authorized computers in iTunes?
And if that is possible, can I deauthorize individual devices remotely?

It seems no one can answer the question since all answers posted here only respond on how you can deauthorize one or all computers. Before I do any of that, I would like to see, which computers are authorized at all and then make a decision which one to deauthorize and which one not.

Is that so hard to answer the question?

Is there any way to see a list of authorized computers or not?

In the "iTunes in the Cloud Beta" is clearly a button to "Manage Devices" all there authorized Computers and when you click on it you see all authorized devices, but the "Computer Authorization " field has only the "Deauthorize All" button.

Again, the question is, is there any way to see a list of computers authorized?

Just to make sure that anyone who read this understand, I have in the "Account Information" Panel under "Computer Authorizations" supposedly 4 (four) computers authorized and under "iTunes in the Cloud Beta" only 2 (two) authorized computers.
I need to know the names of the 4 (four) authorized computers since I have computers in different locations (3 in Florida, 2 in New York) and before I by accident deauthorize one in either state I would like to know which ones are authorized?

There is no way to get a list of computers which are authorized to play media purchased from iTunes. You can only do that for devices. If you don't know which computers are authorized, or you do not have access to those computers, the only solution is to deauthorize all the computers. You can then immediately (or anytime, really) go to each computer and reauthorize it. The only hitch is that you can only deauthorize all computers once per year. In my experience, I've only had to use the deauthorize all option once.

In general, only authorize machines that you have control over, so that it will be easy to deauthorize them if necessary. When you plan to lose control of the computer, remember to deauthorize it first. If you've already lost control of the computer for whatever reason, you can do the deauthorize all option.

Note also that Apple allows you to have multiple Apple IDs. They can't share purchases, but they do allow you to have more flexibility with authorizations. For example, each computer could have its own Apple ID. If you want to share some content between computers, you can deauthorize the target machine and then authorize it with the Apple ID that has the content you want. When done, you can set everything back to the way it was. If you really want to share content over a long period of time, though, the computers will have to share the same Apple ID.